Axial-flow pump or turbine



Aug. 30, 1927. 1,640,601

E. F. DELERY AXIAL i Low PUMP 0R TURBINE Filed June 8, 1923 V s sheets-s heet 1 I "Aug. 30, 1927.

1,640,601 E. F. DELERY AXIAL FLOW PUMP on TURBINE Filed June 8, 1923 3 Sheets-Sheet 2 Aug. 30, 1927. 1, 40,601

E. DELRY AXIAL FLOW PUMP OR TURBINE Filed June 8. 192; s smu -sheet 5 view of the central directing ilar parts.

Patented Aug. 30,1927.

UNITED STATES 1,640,601 PATENT OFFICE.

EUGENE I. DELEBY, .01 NEW ORLEANS, LOUISIANA.

AXIAL-FLOW PUMP OR TURBINE.

Application filed iune 8, 1923. Serial No. 644,256.

My invention relates to axial flow pumps and turbines for operation at relatively low pressures, and the object is to provide a construction at once cheap and efiicient, pro: vision being made for' easy passage of the fluid to andfrom the impeller, the positioning of the main hearing so as to balance the stresses in the bearing and substantially eliminate stresses due to overhang in the 10 shaft and the difluser cone, and the provision of means for keeping grit out of the main bearing by discharge of all grit to .the suction side of the impeller, simple means being also provided for partly balancing 15 the impeller thrust, hydraulically. I attain these objects by the means and mechanism hereinafter described and illustrated in the accompanying drawings-end specification in which:

Figure 1' is-a sectional elevation through the pump; Figure 2 is an elevation of the pump viewed from the right of Figure 1; Figure 3 is an elevation of the pump viewed from'the left of Figure 1; Fi ure 4 is a body 1, removed from the main body of the pump and viewed from the-face 43; Figure 5 is an elevation of part 1 viewed from the leftand removed from the main body 2 of the fiopump; Figure 6 is'a. side elevation of the .central directing body 1 removed from 2; Figure 7 is a side elevation of the discharge impeller cone 3 on which is shown the grooves '46 for mounting the blades 10; Fig- 5 ure 8 is a view of Figure 7 viewed from the left, and Figure 9 is an elevation of Figure 7 viewed from the right; Figure 10 is a side elevation of the assembled pump. In all figures, similar numerals refer to sim- In Figure 1, part of the ump and consists essentially of two cylindrical fluid passages 30 and 31 intersecting at an angle. Passage 31 connects 45 by means'of the flange 25 with the discharge pipe, and is .closed at its farther end by the inclined flange 32 of the central directing body 1, held b welding or other usual means with the ange 39 of 2. The passage 30 connects with the suction pipe by means of the, flange 26.

Within 2 is inserted the central directing body 1, so that the shaft 12 shall be concentric with the passage 30.

This central directing body which forms an important part of this invention shows 2 is the main outer wall in Figures 1, 3, 4, in and 6 and is formed as follows: the inclined flange 32, Fig. 6

formed that it is hollow, Fig. 1, having a lower edge 41 which at the lowest point Figures 4 and 6. The body 33 of 1 is so nearest the incoming fluid at 35 is substantially wedge shaped as in Figs. 1, 3, 4, 5, 6,

but as it approach-es the face 42 it gradually 'merges into a cylindrical shape having a support 34 at that point, as in Figs. 3, 4, 5, 6. The part of 1 above the horizontal plane of the shaft is cylindrical throughout, see Figs. 4 and 5.

In Figure 4 the lug 34 was intentionally omitted in order to bring outthe shape of the edge 41.

1 is. closed at its forward or discharge end by a cylindrical header 5 whose discharge face is 42, Within which is concentrically mounted the shaft 12, which is mounted in a bearing 6 and stufling box 37 within an extension support 4 extending beyond the face '42 of the header It will be observed that this extension 4 extends the full internal lengthof the discharge impeller cone 7 and the grit discharge groove 47,which is placed on the discharge side of 6. The gland 13 also fits in the extension 4 at the header .5.

The exterior bearing 14 may be mounted within the exterior hollow body of l on a bracket 15 as shown,'and a drive coupling 16 is likewise shown, though any other method of driving may be made use of. The g-rit passage 47 registers with an annular groove 48 in 4, which in turn registers with a. concentric recess 49 on the shaft 12,

" Fig. 1.. 8 is a concentric passage in the center of the shaft registering with 31 and a rlght angle turn 9, which registers with the interior of 3, admitting fluid from 31 to 38 at a pressure substantially equal to that existing at 31, As 38 is practically a closed chamber due to a running fit at the face 42 d'ue'to the annular ring 45, it follows that as the prwsu-re within 38 is equal to that pressure outside of 3 that all collapsing stresses have been eliminated. This is a point of improvement; v The discharge impeller cone shown parabolic in section, and hollow is marked 3 and is attachedto the shaft 12 close to the face 43 of 4, just enough clearance being allowed for the fluid through 9 to'register with 38. It extends back over 4,to the face 42, terminating in an annular flange 28 which is closed to the passage 44 by the annular leakage ring 45. At the outer surface of 3 next-the face 42 are mounted the blades 10 either integral with 3 or mounted in grooves may be used for fastening the shaft 12 to the discharge impeller cone 3. The removable semicylindrical plate 18, shown in Fig. 10,sfastened to 2 by the bolts 23 is-merely a 1. splitting of the casing for ease of repair and is a very usual device, and while shown lS I10 part of this invention, in itself.

Among the advanta es of my improved pump are: Better guifance of the entering fluid, better balancing of thestresses in the shaft and the interior bearing, elimination of collapsing stresses in the hollow discharge impeller cone, and partial balance of the impeller thrust, by simple means.

.Thefollowing claims are to .be understood to apply to axial-flow pum s of the general type comprising a dishe suction elbow,

closed next the impeller by a cylindricalheader that carries a bearing support extended .into and concentric with a hollow rotating discharge'cone on which are mounted the impeller blades, which cone is itself fastened at the high pressure end of the actuating shaft, and in all the following claims the-expression a pump of the type described shall be construed to' designatev this class of pump andis used to eliminate undue verbiage and clear up the meaning of the claims.

I claim:

1. In combination, in a pum of the type described, a casing having an e bow portion, a central directing body in the casing, the directin body tapering from a wedge shape form, w ere-it intersects the suction elbow to a cylindrical form, a shaft extending through the directing body and into the casing, a hollow rotatable discharge impeller cone attached at its forward end to the shaft, impeller blades on the other end of the cone, a bearing for the shaft, placed within the hollow impeller cone at a point between the discharge edge of the impeller blades and the point at WlllCh the cone is attached to the shaft, means providin communication between the discharge si e of the impeller and the interior of the impeller cone, said shaft being formed with an annular groove, and communicating meansbetween the annular groove and the suction side of the impeller.

2. In combination, in a pump of the type described, a hollow rotatable cone, impeller bladeson the cone, means for communication between the ump discharge chamber and the interior of the hollow cone whereb pressure within the cone is made substantia EUGENE F. DELERY. 

